Every one of my kids lives this place.
My five year old loves the market. She could.spend hours in there pretending to be a cashier, grocery shopping or being the stock girl that takes the food and reshelves it from the back. I love the smelling drawers that have spices for them to sniff.
My seven year old loves the art room. Painting the huge tree is so much fun. The little art projects keep her happy and then she has a little project to take home with us.
My 11 year old loves the pneumatic tubes. From the huge one that is two stories tall to the little vacuum tube that he can redesign using PVC to shoot ping pong balls higher and higher into the sky.
I even noticed that they have a toddler room and little areas for infants spaced around that attractions so baby brother or sister can have fun while the big kids play.
My tip would be to check out the free culture passes from the phoenix library system. We checked out and got in free.